Can you write down eight eights so that they add up to one thousand?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

To attend world science seminar, A famous chemist from Mexico visit
London. In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "76-20-44 79-16-22-7"

A local detective Jack was called to solve the case,

After reading the note, Jack instantly asked the police to arrest the murderers.

Who are the murderers?

How many times in a given day, minutes and hour clock comes in a straight line ?

I cannot talk, but I always reply when spoken to. What am I?

What is the word or phrase?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside. The man said, "Oh! I am really sorry, I thought this was my room." He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man. What made her suspicious of that man? He might have been genuinely mistaken.

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3